Testo 510i Smart Differential Pressure Manometer

Here is a smart tool that makes recording pressure measurements easier. The Testo 510i Manometer combines with your smartphone or tablet to measure air flow, volume flow, and static pressure. The companion app has pressure drop alarms.

The app can be paired to 6 wireless probes at once. iOS and Android devices are supported. This gadget costs under $100 at this time.